Description of problem:
Following traceback appears when anaconda is trying to start vnc server:

Running anaconda 16.17, the Fedora system installer - please wait.
08:06:54 Starting VNC...
Traceback (most recent call last):
  File "/usr/sbin/anaconda", line 715, in <module>
    setupDisplay(anaconda, opts)
  File "/usr/sbin/anaconda", line 532, in setupDisplay
    runVNC(vncS)
  File "/usr/sbin/anaconda", line 281, in runVNC
    vncS.startServer()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/vnc.py", line 198, in startServer
    self.initialize()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/vnc.py", line 105, in initialize
    devname = devices[active_devs[0]].iface
KeyError: dbus.String(u'eth0', variant_level=1)


boot parameters:
-bash-4.2# cat /proc/cmdline 
root=/dev/ram0 ro ip=off ramdisk_size=40000 cio_ignore=all,!0.0.0009            CMSDASD=191 CMSCONFFILE=e40.conf vnc _escue

Version-Release number of selected component (if applicable):
anaconda-16.17

How reproducible:
always

Steps to Reproduce:
1. start the installation with "vnc" boot parameter
2. connect via ssh to continue with the install
3. select language
4. wait for vnc server to start
  
Actual results:
traceback

Expected results:
vnc server starts successfully

Additional info:
workaround_1: do not use "vnc" boot parameter
workaround_2: use "vnc ksdevice=eth0" boot parameters